Topological Superconducting States and Quasiparticle Transport on Kagome Lattice

Abstract

The pairing symmetry of superconducting states is a critical topic in the realm of topological superconductivity. However, the pairing symmetry of the $A{\mathrm{V}}_3\mathrm{S}{\mathrm{b}}_5$ family, wherein $A=\mathrm{K},\mathrm{Rb},\mathrm{Cs}$, remains indeterminate. To address this issue, we formulate an effective model on the kagome lattice to describe topological superconducting states featuring chiral charge density wave. Through this model, we explore the topological phase diagrams and thermal Hall conductivity under various parameters, with and without spin-orbit coupling. Our analysis reveals that the disparities in thermal Hall conductivity curves between different pairing symmetries are safeguarded by the topology resulting from the interplay of spin-orbital coupling and superconducting states. Remarkably, this theoretical prediction can potentially enable the differentiation of various superconducting pairing symmetries in materials via experimental measurements of thermal Hall conductivity curves.

16 pages, 10 figures

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• Higher-order Oscillatory Planar Hall Effect in Topological Kagome Metal
• Tri-Hexagonal charge order in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121}$Sb NQR

Cited by in corpus (3)

• Impact of Charge Density Waves on Superconductivity and Topological Properties in AV${}_3$Sb${}_5$ Kagome Superconductors
• Majorana edge states in s-wave kagome superconductors with Rashba interaction
• Semiclassical theory for the orbital magnetic moment of superconducting quasiparticles